Oct 09, 2017

Solenoid valve is an electromagnetic control of industrial equipment, is used to control the fluid automation of the basic components, are actuators, not limited to hydraulic, Solenoid pneumatic. Adjust the direction, flow, speed and other parameters of the media in an industrial control system. Solenoid valves can be used with different circuits to achieve the desired control, and control accuracy and flexibility can be guaranteed. There are many kinds of solenoid valves, different solenoid valves in different parts of the control system to play a role, Solenoid the most commonly used is the one-way valve, safety valve, directional control valve, speed control valve.

There are two types of normally closed and normally open. Normally closed when the power is off when the state, when the coil power generated when the electromagnetic force, so that the core to overcome the spring force with the static iron core pull directly open the valve, the medium was channel; when the coil power loss when the electromagnetic force disappeared, moving iron The core under the action of the spring force to reset, Solenoid directly close the valve port, the media barrier. Simple structure, reliable action, in the zero pressure and micro vacuum under normal work. Normally open the opposite. Such as less than φ6 flow path of the solenoid valve.

This valve is used to open the valve and the second valve in one, Solenoid the main valve and pilot valve step by step so that the electromagnetic force and pressure directly open the main valve port. When the coil is energized, the electromagnetic force is generated so that the moving core and the static core are sucked and the pilot port is opened and the valve port is arranged on the main valve port, and the moving core is connected with the main spool, The pressure of the chamber through the valve port unloading, in the pressure difference and electromagnetic force at the same time under the action of the main spool up movement, Solenoid open the main valve medium circulation. When the coil power failure when the electromagnetic force disappears, then move the core in the role of self-weight and spring force to close the valve hole, then the media in the balance hole into the main spool cavity, Solenoid so that the upper chamber pressure, In the spring return and pressure under the effect of closing the main valve, Solenoid the media flow. Reasonable structure, reliable action, work in the zero pressure is also reliable.

Principle: it is a combination of direct and pilot principle, when there is no pressure between the inlet and outlet, the power, the electromagnetic force directly to the pilot valve and the main valve closing parts in turn lift up, the valve open. When the inlet and outlet to start the pressure difference, Solenoid the power, the electromagnetic force pilot small valve, the main valve chamber pressure rise, the upper chamber pressure drop, so the use of pressure to push the main valve up; power, Solenoid the pilot valve using spring Force or medium pressure to push the closing member, move down to close the valve.